import React, { Component } from 'react';

class ClickCounter extends Component {
    constructor(props){
        super(props);
        this.onClickButton = this.onClickButton.bind(this);
        this.state = {count: 0};
    }
    onClickButton(){
        this.setState({
            count: this.state.count + 1
        });
    }
    render(){
        return (
            <div>
                <button onClick={this.onClickButton}>click me</button>
                <div>
                    click count{this.state.count}
                </div>
            </div>
        )
    }
}

export default ClickCounter;
